- do a check for a short circuit again.
1 If there is no short circuit:
_
- install a new DEU-B (300RH6) (Ref. AMM TASK 23-73-47-400-001).
2 If the fault continues:
_
- disconnect the electrical connector 7247VC2 from the DEU mount 2015VU2 (Ref. AMM TASK 23-73-48-000-001).
- do a check for a short circuit again.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : 001-049, 051-099, 101-105, 201-299, ∞∞23-73-00∞∞∞∞∞∞∞∞∞∞Page A272
Aug 01/05R CES
a If there is no short circuit:
_
- install a new DEU mount 2015VU2 (Ref. AMM TASK 23-73-48-000-001) and (Ref. AMM TASK 23-73-48-400-001).
b If the fault continues:
_
- install the removed DEU-B (300RH6) (Ref. AMM TASK 23-73-47-400-001),
- reconnect the electrical connector to the DEU mount 2015VU2 (Ref. AMM TASK 23-73-48-400-001),
- remove the DEU-B (300RH4) (Ref. AMM TASK 23-73-47-000-001),
- do a check for a short circuit again.
- b.1. If there is no short circuit:
- install a new DEU-B (300RH4) (Ref. AMM TASK 23-73-47-400-001),
- b.2. If the fault continues:
- disconnect the electrical connector 7201VC4 from the DEU mount 2011VU4 (Ref. AMM TASK 23-73-48-000-001),
- do a check for a short circuit again.
- b.2.1. If there is no short circuit:
- do a check for a short circuit at the disconnected connector 7201VC4 between pin 9 and GND (pin 11) and between pin 10 and GND (pin 11).
- b.2.1.1. If there is a short circuit:
- repair the wiring between the DEU mount 2011VU4 and the DEU mount 2015VU2 (Ref. ASM 23-73/06).
- b.2.1.2. If there is no short circuit:
- install a new DEU mount 2011VU4 (Ref. AMM TASK 23-73-48-400-001).
- b.2.2. If there is a short circuit:
- install the removed DEU-B (300RH4) (Ref. AMM TASK 23-73-47-400-001),
- reconnect the electrical connector to the DEU mount 2011VU4 (Ref. AMM TASK 23-73-48-400-001),
- do the steps (4. B. (5) (b) 2 b) again for the subsequent DEU(s) and DEU mount(s) until the maintenance message stops: (Ref. ASM 23-73/06) DEU mount 2011VU2.
(6) If the resistance (line to line) is more than 200 ohms (open circuit):
- disconnect the electrical connector 7247VC2 from the DEU mount 2015VU2 (Ref. AMM TASK 23-73-48-000-001),
- make sure that the resistance (line to line) is not more than 200 ohms (open circuit) between: DEU mount 2015VU2 pin A/1 and pin A/2
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-105, 201-299, ∞∞23-73-00∞∞∞∞∞∞∞∞∞∞Page A273
Aug 01/05 CES
(a) If there is an open circuit:
- install a new DEU mount 2015VU2 (Ref. AMM TASK 23-73-48-400-001)
(b) If there is no open circuit:
- reconnect the electrical connector to the DEU mount 2015VU2 (Ref. AMM TASK 23-73-48-400-001)
- disconnect the electrical connector 7201VC2 from the DEU mount 2011VU2 (Ref. AMM TASK 23-73-48-000-001),
- do a check of the wiring (continuity-check) between: DIR-CIDS (101RH) connector AA/A14 and the connector 7201VC2 pin A/1, DIR-CIDS (101RH) connector AA/B14 and the connector 7201VC2 pin A/2.
1 If there is no continuity:
_
- repair the wiring between the DIR-CIDS (101RH) and the connector 7201VC2 (Ref. ASM 23-73/06).
2 If there is continuity:
_
- do a check of the wiring (continuity-check) between: DEU mount 2011VU2 pin A/1 and pin A/9 , DEU mount 2011VU2 pin A/2 and pin A/10.
a If there is no continuity:
_
- install a new DEU mount 2011VU2 (Ref. AMM TASK 23-73-48-000-001) and (Ref. AMM TASK 23-73-48-400-001)
b If there is continuity:
_
- reconnect the connector 7201VC2 to the DEU mount 2011VU2 (Ref. AMM TASK 23-73-48-400-001)
- do the steps 4. B. (6) again for the subsequent DEU mounts until the maintenance message stops: DIR-CIDS (101RH) and DEU mount 2011VU4/connector 7201VC4, DIR-CIDS (101RH) and DEU mount 2015VU2/connector 7247VC2.
(7) If the resistance (line to line) is less than 80 ohms (short circuit):
- remove the DEU-B (300RH6) (Ref. AMM TASK 23-73-47-000-001),
- do a check for a short circuit again.
(a) If there is no short circuit:
- install a new DEU-B (300RH6) (Ref. AMM TASK 23-73-47-400-001), 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 COMMUNICATIONS 通讯2(106)
